Homework 3 Essay Example | Topics and Well Written Essays - 250 words - 6

Homework 3 - Essay Example The physical stimulus of temperature is transduced in the development so as to modulate the expression of the genes coding for steroid genic enzymes and sex steroid hormone receptors. In the temperature dependent sex determination, every individual possesses an equal ability of becoming either male or female. Temperature triggers the activation of one sex-determining cascade. Temperature dependent sex determination is an evolutionary precursor to the genotype sex-determining mechanisms, mainly characteristic of birds and mammals (Becker 249). Exogenous estrogens are used in embryos for the production of females at temperatures that produce only males. On the other hand, an aromatase inhibitor is administered to produce males at temperatures that produce only females. Aromatase is administered since it is the key enzyme that converts androgens to estrogens (Valenzuela & Lance 211-227). In the temperature dependent sex determination, temperature is the regulatory factor that determines the sex of the organisms. It is during the incubation period that the temperature is controlled in favor of the desired sex. The method has proved to be efficient form of environmental sex determination

Anthropology Essay Example | Topics and Well Written Essays - 500 words - 1

Anthropology - Essay Example The investigation of any culture must be implemented carefully and without any preferences in order to define the most important peculiarities of each of them. Traditionally, cultural relativity used double hypothetical method called historical particularism. The term implies that any culture must be studied deeply. This inference is very important not only for anthropology but also for other sciences (Zechenter, 1997). The strong point of  cultural  relativity is that it lets people stick to their ethical principles without being judged by other communities, which have other principles. If people deny this method, they will appear in difficult situation: if they have constant unchanging moral rules, they criticize the communities with other values and maybe even try to make them adapt the moral rules of other community. That will make cross-cultural relations difficult (Zechenter, 1997). Cultural  relativity provides the opportunity to avoid this complexity. According to it, the ethical code of one group of people can be applicable only to their community, that’s why the communities can’t impose their moral standards upon each other. Really, every society has its own values which should be respected by peoples from other cultures (Flew, 1968). When a person comes to another country, he should respect the moral principles existing in this society, but it does not mean that he must adopt them. Every culture has its ethical values which are worth-studying and must be respected by other cultures in certain times (Zechenter, 1997). For example, for our society equal opportunities at work are an ethical requirement, however it is improper in other countries. In the times when patience is considered to be the most essential this can be called a good arrangement (Zechenter, 1997). Nevertheless, the abovementioned point of  cultural  relativity represents also

Corporate finance Essay Example | Topics and Well Written Essays - 4250 words

Corporate finance - Essay Example This analysis will include; A fundamental analysis and valuation of the British Airways using the free cash flow method. And a recommendation will follow suit. Valuation methods will be attended for the purpose of selecting equities for portfolio investments. Valuation methods though are used for proper valuation however, they do not fit all in one place some methods are used for specific companies, as we have inherent differences within firms, companies, industries, outlets etc. and method falls with each member. Some may take more than one, however, about tour valuation methods are to be used. Dividend capitalization goes in to baring out the real truth of a company, its history and ways of behaviour, e.g. Paying of dividends, expansion plans, paying history of business, operation cushion. It opens the investors eyes to see the risks of investment and take caution. Discussions concerning real option analysis in strategic investment decisions will be adequately attended to stressing and bringing out the use of real option analysis in strategic investment decisions. However in attempt to give a fundamental analysis of the British Airways, the examination of the subject will refer to it’s earnings, each flow, equity value and sales and other accounting statements of the airways will be critically analyzed and discussed. The financial record of the British Airways over the years has been quite interesting because for the past three years, its net profit has been appreciating steadily. Since the year 2003 the British Airways have seconded success at the recorded of every year. Below is a table showing the progress of the British Airways since 2003-2005. It is interesting and important to note the difference in the profit margin this clearly shows and suggests that some new policies or new managerial skills have been employed to rightly enhance such as steady progress without any break for

Second World War Essay Example for Free

Second World War Essay The First World War was truly a significant event in history. The tension that began in Europe evolved into a global conflict which lasted for four long years. The war claimed the lives of both soldiers and civilians, and resulted in the massive destruction of property. After the war ended, the countries involved undertook measures which sought to avoid another global conflict. One of those measures was the drafting of several peace settlements, including the Versailles Treaty. This agreement punished Germany and made it solely responsible for the occurrence of the war. Unfortunately, the treaty caused bitterness from the Germans and paved the way for another world war to occur. Coincidentally, it was the Second World War which resolved the unaddressed issues of the first Great War. Indeed, the Versailles Treaty caused the occurrence of the Second World War, which ended the problems of the First World War. The Versailles Treaty considered Germany to be the only nation liable to the occurrence of the First World War. It must be noted that Germany did initiate the establishment of the alliance system, which guaranteed increased conflict in Europe (Perry, 1989). As an outcome of its triumph in the Franco-Prussian War, Germany acquired the provinces of Alsace and Lorraine. In an attempt to secure these former French territories and prevent France from regaining them, the Chancellor of Germany Otto von Bismarck allied with Italy and Austria-Hungary. Germany continued its aggression after Bismarck was removed from office. When William II assumed the throne, Germany demanded more territory and began to increase its naval strength. However, Germany was not the only nation to blame for the First World War. In fact, Serbia was responsible for starting the war. It was a shooting incident which triggered the widespread conflict: a Serbian named Gavrilo Princip shot Archduke Francis Ferdinand of Austria-Hungary and his wife (Heyman, 1997). Austria sought to attack Serbia in return, and turned to Germany for assistance. Hence, the starting point of the First World War was the conflict between Austria and Serbia (Perry, 1989). The end of the First World War brought about several attempts at the restoration of peace, but it was prevented by intentions of the affected parties. Prior to the end of the First World War, U.  S. President Woodrow Wilson had already drafted a program for peace which he presented in Congress through the â€Å"Fourteen Points† speech (Perry, 1989). One of the major points he suggested in his speech was â€Å"peace without victory† (as cited in Perry, 1989, p. 647). Wilson wanted the other countries to practice fairness towards Germany, for he thought that severely penalizing the nation would only force it to avenge their losses. He simply wanted a fair settlement which would guarantee improved foreign relations between the victors and the defeated countries. Unfortunately, Wilson’s hopes ran against the bitter feelings which were developed during the war. The European Allies suffered massive losses, which in turn caused hatred between countries. Among all Allies, France was most affected by the First World War; majority of the battles which happened in the western front took place in French territory. While more than three million French citizens were wounded, more than a million French soldiers died in the war. Hence, it was to be expected that France desired severe punishment for Germany and sought to be compensated for its damaged properties (Perry, 1989). The Versailles Treaty did not guarantee fair treatment towards Germany, as it imposed harsh sanctions on the defeated nation. The settlement was evidently disadvantageous for Germany; it was created to decrease their power and territory. The treaty was beneficial for France; not only did it regain Alsace-Lorraine, but it also obtained control over the Saar coal mines (Halsall, 1944). Germany also lost territory to Poland and Britain (Perry, 1989). In addition, the Versailles treaty significantly reduced the military capability of Germany. The agreement required the German army to be limited to 100,000 people, all of which were to be volunteers (Halsall, 1944). Germany was also asked to demilitarize their territories in both sides of Rhine River. More importantly, the treaty demanded Germany to pay other nations due to the damages which resulted from the war. Germany was supposed to pay $33 billion worth of reparations, an amount only determined two years after the nation signed the treaty (Perry, 1989). In general, the Versailles Treaty blamed Germany for the First World War and severely punished it as a result. Consequently, the Germans were angered by the conditions of the Versailles Treaty and provoked them to start yet another world war. Germany was enraged by the demands for reparations; they thought that the amount given for them to pay exceeded the nation’s financial capacity (Perry, 1989). Germans also disagreed with treaty on grounds of being solely responsible for the outcome of the war. They upheld the belief that Germany must not be singled out, for all the nations involved in the war must be held accountable for its consequences. After the First World War, Germany became a part of the League of Nations, the organization which was created for the purpose of developing peace and cooperation between countries. The country also participated in other postwar activities directed at maintaining peace. Despite these efforts, majority of the Germans were still not ready for peace. Most of them remained bitter towards the Versailles Treaty. The animosity was derived from humiliation after defeat; after all, the settlement disarmed their nation, reduced their territories and required them to pay a great sum (Bergen, 2002). The Weimar government attempted to modify the treaty through peaceful means. When Adolf Hitler came into power, he completely undermined the Versailles Treaty (Perry, 1989). With Hitler as leader, Germany violated the Versailles Treaty and started the path to the Second World War. Hitler quickly broke the conditions of the treaty; he disregarded the limitations imposed on the country. He immediately increased the army to 550,000 men and rearmed it (Sulzberger, 1985). Hitler also sent troops in Rhineland; this action was clearly a violation of the demilitarization in the area as demanded in the treaty. In what seemed to be a response to the loss of lands due to the Versailles Treaty, Hitler sought to expand German territory by uniting all German-speaking people (Sulzberger, 1985). All of the aforementioned aggressive acts committed by Hitler sparked another global conflict and eventually resulted in what everybody feared: the Second World War. Ironically, the problems of the First World War were resolved by the Second World War. One of the problems of the Great War was self-determination, the principle wherein national groups choose their own political state (Perry, 1989). The reason behind Archduke Ferdinand’s assassination was the Serbs’ desire to unite all Slavic peoples. President Wilson included the principle of self-determination in his â€Å"Fourteen Points,† yet it proved to be problematic. Hitler even used the principle to invade other countries. After the Second World War, self-determination was no longer proposed. Instead, the Atlantic Charter drafted by U. S. President Franklin D. Roosevelt and British Prime Minister Winston Churchill proposed the self-government to peoples. Meanwhile, the restoration of peace was also a dilemma after the First World War. The nations tried to restore peace through various peace settlements, including the Versailles Treaty. However, the treaty exacerbated the war problem. After the Second World War, there was already an international organization established to maintain peace among countries. Rather than make individual peace treaties to each Axis power, the Allied countries sought peace as the United Nations. This move proved to be more effective in restoring global peace and order (Perry, 1989). The First World War was a genuinely significant experience. The armed conflict was caused and characterized by tension, so there were many efforts to avoid yet another war from taking place. The Versailles Treaty was a peace settlement, but it did not contribute to the restoration of peace. Rather, it caused the Second World War by provoking Germany to seek revenge over its sanctions. Fortunately, with the occurrence of the Second World War, the problems of the Great War were settled.

Fostering Motivation by the Help of Neuroplasticity

Fostering Motivation by the Help of Neuroplasticity There are two types of mindset: fixed versus growth mindset. In fixed mindset, students (people) believe that their abilities is innate and they cannot change it, therefore a failure makes them start doubting in themselves and believing they are not smart/good enough to achieve their goals. On the other hand, those who have a growth mindset believe that they can improve their abilities by learning and practicing. They see failure as an opportunity to working on their mistakes and weaknesses; their perseverance and resilience makes them more motivated and work harder to improve their abilities. Moreover, one of the biggest difficulties that students face when they enter to a new stage of their academic life is lack of motivation. The main idea of this project is improving growth mindset as well as fostering intrinsic motivation among students by teaching them about the brain and neuroplasticity. For this purpose, a weekly workshop will be designed for five sessions. Below is the detai l of each session. Method This project is based on learning science approach with focus on embodiment and feedback which are explained in details. Participants In order to meet the goals of this project and having a sound base of interpretation of the results and eliminating some of the confound variables like method of learning and environmental differences, students from one class will be selected to participate in the workshop. Junior students are extremely vulnerable to fail to achieve an acceptable grade during their high school, because in general children in this age suffer from antisocial behavior, lack of self-esteem, school engagement and more importantly being motivated enough to continue their study. Having a positive or negative outcome in this age depends on students motivation and motivation is dependent on children core belief. In other words, the way students deal with their environment, indicate their future success and exactly here motivation comes to play an important role because if students are motivated enough to continue their study and like to challenge themselves, they can survive and even flourish during this peri od (Blackwell et al., 2007). For this reason, target group in this project will be high school students. Both male and female students with any ethnic background can participate in this study. It is ideal to have a balanced number of male and female participants in order to control for any potential gender differences in the study. Materials Prior to participating in the workshop, participants will be asked to answer to two questionnaires: one of them is a motivation questionnaire to examine students goal in the coming year and their view about the value of efforts and the other one is a mindset questionnaire. The mindset questionnaire will measure students core belief about their intelligence, goal orientation, belief about effort and attribution and strategies in response to failure. Teachers report on students level of engagement and motivation in classroom will be also collected. To investigate the impact of growth mindset on long term achievements (outcomes), the same questionnaire will be distributed at the end of semester, which will be two months after the workshop. The latest grade of students mathematic achievements (CAT) and students new math grade at the end of semester will be collected. Procedure Session 1: The Neurons: Structure and Function In this session, students will learn about concept of neuron and its structure and neurotransmitters by lecture and pictures (figure 1 and 2). The lesson plan for this session is as the following: Lesson Plan There are two types of cells in the brain: The first type is called glia, which comes from a word that means glue and they hold the brain together. Glia plays an important role in the processing and communication. The main brain cells are called neurons. They have a lipid bilayer as a cell membrane to keep everything inside. They have the fluidly cytosol, the liquid inside. Neurons have three main parts, the cell body, or the soma, is where we find the nucleus, the part that has DNA. And the other parts are the specialization that allows the neurons to communicate with other cells. Dendrites are branches around the soma. It integrates it in two ways, both spatially and temporally. Spatially means weve got all these inputs coming from different parts of the brain and temporally means that theres a time window over which the cell is looking at. Once the information has been summed up and the neuron decided how to process it, the neuron sends output down to the axon. Neurons shapes and sizes depend on their function within the neural circuit. The stereotypical one is called a multi-polar neuron which has more than one dendrites and only one axon. Bipolar neurons have one input and one output. Unipolar neurons have basically one long transmission wire with the cell body off to the side, so information just kind of flows down with, no real interference from the soma itself. Physiological properties of the neuron: The neuron is actually using electricity to send through the dendrites and then down the axon. Every cell has an electric membrane potential, or an electric resting potential, which is the difference between the electrical potential energy inside and outside the cell. By recording the electrical potential of cell membrane versus the electrical potential at an electrode outside the cell membrane we can have voltage difference. Most cells have a resting membrane potential of about -70 or -65 mV. The other property thats really important about the neurons is t hat they have Ion channels, which are like doorways in their cell membrane. When their membrane potential gets high and reaches the thresholds, these doors can open. Signal starts at this area at the juncture of the soma and the axon thats called the Axon Hillock. So, what happens is the membrane potential of the cell reaches a certain threshold, and that causes the door to open. When the door opens, positive ions start coming into the cell, which causes the membrane voltage to go up and opens more of these voltage sensitive doors. And eventually there would be a big influx of positive current, but the Ion Channels will be close very fast. That quick increase and decrease of the membrane potential, is called an action potential, which lasts for about one to two milliseconds. Action potential is an all-or-none event. As the positive ions are coming in from action potential that started at the Axon Hillock, its going to increase the memory voltage of the axon right next to it. Therefo re, more channels will be opened and more positive current flow in which will cause action potential to travel down the length of axon. What the neurons saying in the pattern of its spiking activity. In general, neuron does not directly talk to the next neuron via an electrical signal, instead when the electrical signal gets to the tip of the axon, the axon will release chemicals called neurotransmitters. Neurotransmitters are chemicals messengers that travel over a small gap between the neurons sending the information and the dendrites of the neuron receiving the information. That gap is called a synapse. The neuron receiving the information by their dendrites on that post synaptic side of this gap have special receptors for receiving the released chemicals by the presynaptic neuron. When the chemical binds to those special receptors, that causes changes in the membrane potential of the second neuron and then that neuron can collect that information and send its signal to its neigh bors. After this lecture, students will have time to ask any questions and discuss their thoughts and understanding of the concept of neurons within small groups. By the end of this session, students will learn about basic properties of neurons and how neurons communicate with each other.                Session 2: Brain structure and Function In this session, after a brief recalling of last session which was about neurons, few fact cards about brain will be given to students. Next, a brief introduction of brain anatomy and main areas of brains will be given by the help of pictures (figure 3 to 5). For avoiding boredom in students, instead of lecture given by the instructor, they will watch short videos explaining brains function. Videos are from an online course offered by University of Toronto Facts that are given after figure 3: Weight: 3 lbs 2% of total body weight Consumes 25% of the bodys oxygen supply Consumes 70% of the bodys glucose supply Consumers 25% of the bodys nutrients 100 Billion Neurons Facts that are given after figure 4: With matter is inside the brain and Gray matter is outside the brain Cerebral cortex is wrinkled. The grooves that make these wrinkles are called sulci and the ridges between them are called gyri Two hemispheres are connected by Corpus Callosum Facts that are given after figure 5: Brain has two main parts: cortex which has 4 parts: frontal, temporal, parietal and occipital lobe. and the other part is cerebellum After watching the videos, students will discuss their questions, any misconception that they might have about the brain and gained knowledge in small groups. The session will end by given pictures of brains structure and areas that students are required to name them. Session 3: Neuroplasticity In this session, the topic of neuroplasticity which is about the electrical and neural changes in the brain during learning will be thought. The lesson plan will be a brief explanation of neuroplasticity by summarizing some researches about this concept: Plasticity is one of the most essential functions of the human brain. According to Munte et al (2002) Neuroplasticity allows the brain to adapt to environmental factors that cannot be anticipated by genetic programming There are a vast majority of researchers that are interested in this topic and have been examining plasticity via different experiments both on animals and human. One of these researchers named Dr Norman Doidge who is author of The Brain that Changes Itself. In his book he talked about the brain as a modifiable, changeable, adaptable and plastic organism that is able to change its function and even structure without chemical reaction in the body, just based on our interaction with the brain. The interesting thing about the power of the brain is, its ability to change structurally even with imagination. Another discovery related to plasticity is the fact that learning changes the number of connection between neurons; even with hours of training the number of connection between two neurons can increase from 1300 to 2700 as an example. The reason how plasticity happen in our brain is: through activities and thoughts that people do with their brain, there are certain genes in nerve cells that become on and others off, this change causes producing protein and protein finally makes change in brain structure. This discovery made a strong proof for the role of learning and training in changing our brain and as a result changing our mind and behavior (Bush et al., 2004). People are able to change their behavior as a result of functional changing in their brain, for example depression is a severe disorder that causes 25% loose of gray matter in hippocampus. This is due to fact that chronic stress release cortisol which gradually weakens the role of left prefrontal cortex, a region that is known as a controller of negative emotion, and the weak activity of PFC causes 25% loose of gray matter in hippocampus. An experiment done in UK showed that the size and amount of gray matter would be the same again after 5 weeks of treatment in depressed people. Similarly, in article written by Draganski et al., (2004) the same finding was reported. Subjects of their experiments were d ivided into two groups: learner and non-learner. They scanned their subjects brain at the beginning of experiment and find that there is no difference between two groups. Then they taught the learner group how to juggle and when their subjects were professional enough to juggle in 1 minute, they had another FMRI scan for both group. For learners the amount of gray matter in the mid-temporal area and in the left posterior intraparietal was increased by 25% compared to non-learner and compared to the first scan. Finally they had third scan after 3 months without training for both group and they found that the amount of gray matter decreased again in learner group. Their finding was consistent with the finding about depression. Mà ¼nte et al., (2002) examined neuroplasticity in musicians that had begun their training in early age. They found musicians who began before the age of seven had a larger anterior midsagittal corpus callosum compared to others that started later. Therefore, they were able to have a bidirectional movement. In order to be able to control bidirectional movement, an enhanced interaction between two hemispheres is needed and since number of axons that can be transmitted to other hemisphere depends on size of midsagittal corpus callosum, therefore musicians with larger AMCC were able to have bidirectional movements. Elbert et al., (1995) showed that string players had a larger cortical representation of the digits finger in the left hand compared to non-musicians. They argued that even neuroplasticity was different among musicians depending on their interaction with music and their professional usage of music; for example a conductor is better in understanding non-adjacent and separatin g adjacent sound sources. Accordingly, there is an automatic movement in musicians body (fingers of hand or even leg) when they just listening to music and vice versa. This is because of co-activation of motor-audio regions in their brain. After this lecture, students will ask their questions (in case of any) and form small groups to share their ideas about neuroplasticity. During these sessions, students learned how their brain can be manipulated by practicing By the end of this session, knowledge creation about the brain will be ended. Therefore, in order to test the output of the sessions, they will be required to articulate their learning. They can either create an artifact (brain, neuron), or write a short essay related to neuroplasticity. As Chinn and Sherin (2005) mentioned one of the problem of team work would be more knowledgeable students will do the load of works and some students might be quiet and their learning process might be overestimated if they work in a group. To avoid this problem, each student is required to do articulation alone. They need to complete this task before last session. Understanding Goal: By the end of this session, students will understand that brains function and even structure can be changed. Session 4: Mindset Change This session consists of two parts. First part is the activity part in which students will discover more about brain and brain plasticity. This part is designed based on embodiment approach. Embodiment in a broad sense could be defined as the study of the subjective role of the body in making sense of life experiences (Kiverstein, 2012). In other words how our bodies influence and shape the way we speak, think, and behave with regard to environmental challenges we face in our daily lives (Gibbs, 2005). Following such a definition the idea of embodied cognition points out to the inter-connection of mind and body and how they both influence each other. Such an idea was raised as a counter-intuitive argument against the mind-body dualism proposed by Rene Descartes in the 17th century which supported a separation between human body and the external world in which body is completely divisible and mind is completely abstract and indivisible. However, this view was challenged by philosophers like Merleau-Ponty (1962) who viewed body as a primordial existence prior to the existence of a reflected world, and understanding of the external world as a reflection of the humans body. Pointing to the inter-relationship between body, environment, and peoples perception of the environment (i.e. the external world) Merleau-Ponty (1962; 235) writes that body is the fabric into which all objects are woven, and it is, at least in relation to the perceived world, the general instrument of comprehension (cited in Gibbs, 2005; p. ). Drawing from the definition of the embodiment, it can be concluded that acquiring and comprehending knowledge and solving problem are not solely manipulated in the brain. Conversely, it is influenced by the interaction we have with the external world and how our bodies manage to perceive them. According to Lakeoff and Johnson (1980) this relationship is highly represented in numerous metaphorical expressions in the language we use. For example we may say the something is beyond us when we cannot understand what a specific expression refers to. In this case we make a connection between our understanding of physical distance and mental concept of uncertainty in order to show how we feel about it. Using Lakeoff and Johnsons metaphorical representations, Barsalou (2008, p. 618) through exemplifying the act of sitting on a chair argues that embodied learning can take place through activating a perception-action-introspection complex. According to Barsalou (2008) this whole process is an i ntegrated and multimodal representation of current and past sensory experiences which results in comprehending an object. According to Abrahamson and Lindgren (2014)in order to place the embodiment theory in education there is need to have an embodied design in order for learners approach a problem in a subject matter through their natural body instinct and movements (p. 363). However, embodied designs could be challenged from three aspects of the types of activities, materials and artifacts, and facilitation of conceptual development. Accordingly they proposed that each of those challenges could be appropriately met through using initial simple activities which fall within the experiential domain of learners and then gradually move toward more symbolic one. Moreover, the types of materials and artifacts used to promote learning in such kinds of designs should be similar to ones found outside these designs and in unmediated environments. Finally, the movement and body engagement should be facilitated through providing real-time feedback by tutors and teachers to help learners develop their own conceptua l insights. Given this brief explanation of embodiment, students will participate in an activity that will result in understanding how their brain can be manipulated by practicing and how their intelligence could be increased through learning. During activity part, they will go through a Neural Network Maze spelling out the word SMARTER and saw how this network change when they learn something new. This activity is based on BNlackwell et al., (2007). In the second part students will see some examples of disabled people who were able to manage their disability and succeed in their life. The aim of this activity is showing students that even people who are suffering from major problems and lost their critical abilities (like walking) did not give up and challenge themselves to achieve their goals. An example of disabled people is Nicholas James Vujicic who is an Australian motivational speaker. He was born with tetra-amelia syndrome and has neither arms nor legs, but could graduate college with a bachelor degree in financing and is a successful writer. Understanding Goal: Everyone can be smart, because intelligence is not statistic and unchangeable Efforts is the most important factor in improving ability The way they think about their ability, can affect their behavior Session 5: Improving motivation by the help of feedback In the last session of workshop, students will summarize their learning and will explain how their misconceptions have changed (if changed) and the instructor will give each student the appropriate feedback. Depending on the number of students participated in this workshop, each student will have time to show their artifact or read their essay that was asked to complete it by the end of session 3. Instructor (experimenter) will give feedback for each students work because as we already know feedback is one type of reward and it can motivate students and even change extrinsic motivation to intrinsic motivation. Below is a summary of researches that support the effect of reward in increasing students motivation and their performance Harackiewicz (1979) was concerned about relation between feedback, motivation and the outcome and examined this relation among high school students. He found positive feedback increase motivation and motivation increase performance. However he claimed that positive feedback on the performance has different effect compared to reward effect. Positive feedback which is assessed as verbal rewards is known as an unexpected, competence improvement reward and has a significant positive influence on intrinsic motivation. In two studies that used positive feedback as a motivational resource, they tested how a slightly change in wording can bring a fundamental change in the motivation. In the first study, Ryan (1982) used a controlling feedback by saying: Excellent, you should keep up the good work, whereas in the other study, Pittman et al. (1980) used an informational feedback: Compared to most of my subjects, you are doing really well. The result of these two studies was in line with the claim; in the first statement subjects had less intrinsic motivation after few trials compared to second informational feedback. In conclusion, positive feedback can bring interest for receivers and will increase intrinsic motivation. ODohetry (2004) wrote an excellent review about the underlying mechanism of reward seeking and punishment avoidance in human behaviors. He discussed recent neuroimaging findings which gives insight into the reward representations and reward-related learning process that take place in the human brain. The author highlighted the involvement of ventromedial prefrontal cortex, amygdala, striatum, and dopaminergic midbrain in the reward-related learning process. Providing evidence from human neuroimaging, the author argues that specific reward-induced behaviors are subject to the function of different parts of the aforementioned network. However, no matter which component guides which specific reward-related behavior, the persistence of behavior is dependent on the value assigned to the reward and perhaps the punishment within this network. The importance of the findings reported in this paper is connecting them with goal-directed behavior which requires complex cognitive resources and fu nctionalities. In other words, the complexities involved in choosing between various behaviors and actions are based on evaluation of their representation of the predicted future rewards with the selected action having the highest predicted reward which varies depending on the its quality, frequency and variance in specific situations. As stated in the article, there are three main parts of the brain that is responsible for guiding our action. Therefore, our behavior is formed controlled as a response to a value of reward or punishment. The author also made a distinction between these parts and the role of each part in seeking the reward, evaluating the value of reward or punishment, predicting the future reward/punishment and deciding about a proper action based on the prediction of value. As a result becoming motivated in doing an action depends on the value of reward or punishment as well as its amount that is aligned with that action even in future. Our brain and even animals br ain is able to learn how to guide our action to receive rewards. It means, our brain tracks and analyses the process of gaining a reward for future use just like the classical conditioning situation. Better reward causes more motivation (ODohetry, 2004). Understanding Goal: By putting enough efforts, students can increase their performance on school Reference: Abrahamson, D., Lindgren, R. (2014). Embodiment and embodied design. In R. K. Sawyer (ed.)The Cambridge handbook of the learning sciences, pp. 358-376. Barsalou, L. W. (2008). Grounded cognition. Annual Review of Psychology, 59, 617-645. Blackwell, L. S., Trzesniewski, K. H., Dweck, C. S. (2007). Implicit theories of intelligence predict achievement across an adolescent transition: A longitudinal study and an intervention. Child development, 78(1), 246-263. Busch, V., Schuierer, G., Bogdahn, U., May, A. (2004). Changes in grey matter induced by training. Nature, 311-312. Doidge, N. (2007). The brain that changes itself: Stories of personal triumph from the frontiers of brain science. Penguin. Draganski, B., Gaser, C., Busch, V., Schuierer, G., Bogdahn, U., May, A. (2004, January 22). Changes in grey matter induced by training. Nature, pp. 247: 311-312. Elbert, T., Pantev, C., Wienbruch, C., Rockstroh, B., Taub, E. (1995). Increased cortical representation of the fingers of the left hand in string players. Science, 270(5234), 305. Galvà ¡n, A. (2010). Neural plasticity of development and learning. Human Brain Mapping, 31(6), 879-90. doi:10.1002/hbm.21029 Gibbs Jr, R. W. (2005). Embodiment and cognitive science. Cambridge University Press. Harackiewicz, J. M. (1979). The effects of reward contingency and performance feedback on intrinsic motivation. Journal of Personality and Social Psychology,37(8), 1352. Kiverstein, J. (2012). The meaning of embodiment. Topics in cognitive science, 4(4), 740-758. Lakoff, G., Johnson, M. (1980). Metaphors we live by. Chicago: University of Chicago Press. Merleau-Ponty, M. (1962). Phenomenology of perception. London: Routledge Kegan Paul. Mà ¼nte, T. F., Altenmà ¼ller, E., Jà ¤ncke, L. (2002). The musicians brain as a model of neuroplasticity. Nature Reviews. Neuroscience, 3(6), 473-8. doi:10.1038/nrn843 ODoherty, J. P. (2004). Reward representations and reward-related learning in the human brain: insights from neuroimaging. Current opinion in neurobiology,14(6), 769-776. Pittman, T. S., Davey, M. E., Alafat, K. A., Wetherill, K. V., Kramer, N. A. (1980). Informational versus controlling verbal rewards. Personality and Social Psychology Bulletin, 6(2), 228-233. Ryan, R. M. (1982). Control and information in the intrapersonal sphere: An extension of cognitive evaluation theory. Journal of personality and social psychology, 43(3), 450. Sawyer, R. K. (Ed.). (2005). The Cambridge handbook of the learning sciences. Cambridge University Press.

The Devastation of Agent Orange Essay -- Exploratory Essays Research P

Abstract: This paper exposes the social injustices to Americans and to Vietnamese resulting from spraying of Agent Orange during the Vietnam Conflict. American Vietnam Veterans and many Vietnamese citizens have struggled with the United States Government for due reparations from the devastation of Agent Orange that has shattered their lives. Veterans have demanded compensation for this injustice through lawsuits and government allocations while the Vietnamese want the United States to clean up their dioxin-contaminated land and waterways. The United States has denied responsibility and the battle continues as veterans and the Vietnamese challenge the United States to accept its wrongdoing. This paper provides the evidence that the US government knowingly sprayed innocent people without warning. Based on the treatment of US military personnel, this paper argues that a major international effort will be required to force the US Government to assist in responding to the Vietnamese cr isis. Background During Operation Ranch Hand the US Air Force sprayed approximately 18 million gallons of the herbicide and defoliant, Agent Orange, over South Vietnam from 1965 - 1970 (Moore 2000). Both US military bases and Vietnamese cities were sprayed in order to decrease the amount of foliage to prevent surprise attacks as well as to deprive the enemy of food, since much of the spraying was over agricultural land. Agent Orange is composed of equal parts of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5- trichlorophenoxyacetic acid (2,4,5-T) (Moore 2000). Agent Orange was also contaminated with 2,3,7,8-tetrachlorodibenzo-para-dioxin (dioxin) which is a byproduct of the manufacturing of 2,4,5-T (Moore 2000). Dioxin has been described as the "... ... Constable, Muneaki Matsuda, Vu Duc Thao and Amanda L. Piskac. "Recent Dioxin Contamination from Agent Orange in Residents of a Southern Vietnam city". Journal of Occupational and Environmental Medicine. Volume 43, Number 5. May 2001. pp. 433-443. Schector, Arnold, Marian Pavuk, John D. Constable, Le Cao Dai, and Olaf Papke. "A Follow-Up: High Level of Dioxin Contamination in Vietnamese from Agent Orange, Three Decades after the end of spraying". Journal of Occupational and Environmental Medicine. Volume 44, Number 5. March 2002. pp.218-220. Wilcox, Fred. Waiting for an Army to die. Seven Locks Press: Cabin John, MD. 1989. Winerip, Michael. "US Judge clears way for trial on Agent Orange". New York Times. May 18, 1983. Young, A.L. and G.M. Reggiani. Agent Orange and its associated dioxin: assessment of a controversy. Elsevier: Amsterdam. 1988.

Imperial presidency Essay

In the age of the imperial presidency, it is easy to lose sight of the fact that, in the totality of American history, a powerful chief executive has been the exception rather than the rule. Indeed, until the mid-twentieth century, the most powerful person in peacetime American governments was the Speaker of the House of Representatives rather than the president. Prior to World War II, presidential power was ascendant only during wartime. It is no mistake that the three men commonly cited as our greatest presidents also led the nation through its three most important wars. The image of George Washington as president is inseparable from his role in the American Revolution. Abraham Lincoln is remembered for his role in preserving the Union through the Civil War; other aspects of his presidency are largely ignored. Although Franklin Roosevelt accumulated considerable personal power during the 1930’s, he will be remembered for guiding the United States through World War II in the 1940’s. George W. Bush often refers to himself as the â€Å"Commander in Chief† rather than simply the â€Å"President† or the â€Å"Chief Executive†. This reflects President Bush’s acknowledgement of the fact that â€Å"Commander in Chief of the Armed Forces† is the most concentrated and unchecked power that a president is granted under the constitution. Any student of history is aware that a president is far more powerful when he is perceived to be not just a chief executive but a commander in chief. In other words, for a president to be historically powerful, there must be a war on. The watershed moment for the imperial American presidency was the aftermath of World War II. After every prior American war, the nation had demobilized, the president had assumed his traditional, more limited portfolio, and the Congress had reestablished its position as the pivotal branch of the federal government. After World War II, however, and especially after the outbreak of the Korean War in 1950, there was no demobilization. Instead, the executive branch of the federal government underwent an overhaul and reorganization that irreversibly changed the nature of the presidency and of the United States itself. President Truman would mold a policy that was without precedent in American history; this policy would call for large standing armies in peacetime, a radically strengthened and centralized executive, and a willingness to project American force around the world, at times without direct congressional approval. The underlying logic to this revolution in American government was the need to contain the expansionist designs of the Soviet Union. In 1947, the National Security Act created the CIA, the Department of Defense, and the National Security Council. This creation of a spy agency, a permanent standing army, and a radically strengthened executive changed forever the nature of American government. After the National Security Act of 1947, a permanent war footing, or at least a war psychology, settled over Washington, D. C. Although the United States was technically at peace more often than not for the rest of the century, the president’s identity as â€Å"commander in chief† maintained a gravity that simply would have been impossible in prior periods. One mitigating factor in this shift was the logistical realities of modern warfare, embodied most purely and terribly by nuclear weapons. The incomparable damage that such weapons could exact, and the relative speed with which they could be delivered, precluded consultations between the President and the Congress under many feasible scenarios. This inevitably strengthened the latitude and increased the responsibility of the chief executive, who could become the commander in chief, responsible for the physical survival of the United States, at any given moment. The psychological shift was just as important as the revolution in weaponry. For the first time the United States, or at least its leadership, perceived itself to be under siege even in the absence of a hot war. The idea of a global and aggressive Soviet menace led to a willingness in American leaders to interpret local and isolated conflicts as part of a broader communist conspiracy that must be contained by a massive American military machine. Human nature being what it is, the unprecedented size and power of the Pentagon made it far easier for American presidents to order the use of force, which in turn consolidated their power as active â€Å"commanders in chief†. From 1947 through 1991, the United States fought two major wars in Korea and Vietnam, but the overarching Cold War solidified the idea that the president’s primary and permanent role was to serve as commander in chief. This notion would have known no place in America prior to World War II. The nation was founded on a well-reasoned fear of centralized executives and the nation had spent most of its early history avoiding such pitfalls. During the Cold War, it embraced this pitfall as an unfortunate necessity, if not a virtue. At the end of the Cold War, there was talk of a â€Å"peace dividend† which would allow for radically reduced defense spending and, by implication, a more restrained presidency. The Gulf War of 1991 arrived just in time to forestall any radical lurch in that direction. During the Clinton administration, the presidency remained powerful, and the United States carried out several military operations from Haiti to Kosovo. The strength of the presidency was only magnified by the fact that the United States was now the only global superpower. The 9/11 attacks, of course, put America on an indefinite war footing analogous to the Cold War. George W. Bush declared with what looked to some as great excitement that he was a â€Å"war president†. Since the United States has been at war in Afghanistan and Iraq for six years, Bush’s personal power has been established by stressing his identity as commander in chief, identifying the defense of the United States as his most important task. Another issue that has risen out of Bush’s embrace of the imperial presidency is how such power is exercised domestically as opposed to internationally. President Bush and his attorneys have argued that the United States is involved in a war in which all of the Earth, including the United States, is the â€Å"battlefield†. This means, according to their arguments, that the president’s power as commander in chief applies just as much in the United States as anywhere else. This dubious and dangerous idea has led to unwarranted surveillance of American citizens in the United States, indefinite detention without charge or legal representation for anyone identified by the commander in chief as an â€Å"enemy combatant†, and the use of â€Å"enhanced interrogation† on detainees, which any honest person would call torture. These draconian measures are best embodied in the Military Commission Act of 2006, which effectively suspends Habeas Corpus and all subsequent legal rights to any individual declared an enemy on the sole authority of the commander in chief. The domestic and international conditions which prevailed when the founding fathers wrote the constitution are obviously no longer valid. It is a testament to the genius of these men that the American system has lasted as long as it has. While certain changes are necessary and inevitable over the decades and the centuries, I am personally very uncomfortable with the level of power that is concentrated in the modern presidency, especially as manifested by the Bush administration. The current administration is the embodiment of the danger inherent in so much power being vested in a single person. After World War II, new global realities called for a more robust presidency, but the balance that was struck with varying degrees of success throughout the Cold War is absent from the current situation. The Military Commission Act of 2006 allows the President to kidnap an American citizen, hold him in prison without charging him with a crime, letting him see a lawyer or a judge, or telling his family where he is, torture him, and never release him. This is not hyperbole; it is now allowable under American law. Most people with respect for human dignity and for the American constitution can agree that this is not the America we want to live in. â€Å"A democracy cannot wage war. When you go to war, you pass a law giving extraordinary powers to the President. The people of the country assume when the emergency is over, the rights and powers that were temporarily delegated to the Chief Executive will be returned to the states, counties and to the people. † –General Walter Bedell Smith (Weiner 189). Works Cited Lowi, Theodore J. , Benjamin Ginsberg, and Kenneth A. Shepsle. American Government: Power and Purpose. W. W. Norton, 2005. Shafritz, Jay M. and Lee S. Weinberg. Classics in American Government. Wadsworth Publishing, 2005. Weiner, Tim. Legacy of Ashes: The History of the CIA. Doubleday, 2007.